Portable wireless speaker



FIG. 1 is a perspective view of a portable wireless speaker showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view viewed from another visual angle thereof; and,

FIG. 9 is a perspective view showing the practical usage thereof.

The broken lines depict portions of the portable wireless speaker which form no part of the claimed design. 

CLAIM The ornamental design for a “portable wireless speaker,” as shown and described. 